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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_000_005_506">&nbsp;</a>NAME</h4><blockquote>
getdtablesize - get the file descriptor table size
(<b>LEGACY</b>)
</blockquote><h4><a name = "tag_000_005_507">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

#include &lt;<a href="unistd.h.html">unistd.h</a>&gt;

int getdtablesize(void);
</code>
</pre>
</blockquote><h4><a name = "tag_000_005_508">&nbsp;</a>DESCRIPTION</h4><blockquote>
The
<i>getdtablesize()</i>
function is equivalent to
<i><a href="getrlimit.html">getrlimit()</a></i>
with the RLIMIT_NOFILE option.
<p>
This interface need not be reentrant.
</blockquote><h4><a name = "tag_000_005_509">&nbsp;</a>RETURN VALUE</h4><blockquote>
The
<i>getdtablesize()</i>
function returns the current soft limit as if obtained from a call to
<i><a href="getrlimit.html">getrlimit()</a></i>
with the RLIMIT_NOFILE option.
</blockquote><h4><a name = "tag_000_005_510">&nbsp;</a>ERRORS</h4><blockquote>
<p>
No errors are defined.
</blockquote><h4><a name = "tag_000_005_511">&nbsp;</a>EXAMPLES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_005_512">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
There is no direct relationship between the value returned by
<i>getdtablesize()</i>
and {OPEN_MAX} defined in
<i><a href="limits.h.html">&lt;limits.h&gt;</a></i>.
<p>
The 
<i><a href="getrlimit.html">getrlimit()</a></i>
function returns a value of type 
<b>rlim_t</b>.
This interface, returning an 
<b>int</b>,
may have problems representing appropriate values in the future. 
Applications should use the 
<i><a href="getrlimit.html">getrlimit()</a></i>
function instead.
</blockquote><h4><a name = "tag_000_005_513">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_005_514">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="close.html">close()</a></i>,
<i><a href="getrlimit.html">getrlimit()</a></i>,
<i><a href="open.html">open()</a></i>,
<i><a href="select.html">select()</a></i>,
<i><a href="setrlimit.html">setrlimit()</a></i>,
<i><a href="limits.h.html">&lt;limits.h&gt;</a></i>,
<i><a href="unistd.h.html">&lt;unistd.h&gt;</a></i>.
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UNIX &reg; is a registered Trademark of The Open Group.<br>
Copyright &copy; 1997 The Open Group
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